Condenser



LESER Filed May 7, 1924 rough and tine adjustments.

Another object ot' the invention is to pro,

itl

Patented Apr. 26, 1927.

GERGE A. G-ILLEN, 0F JERSEY CITY, SERSEZ',

BAKER SYNDICATE INC., OF ELMHURST. YO K,

YORK.

CONDENSER.

Application met! May 7,

This invention relates to improvements in variable condensers and its object ls to pron vide a device wherein the positive and negative plates are relatively adjustable for both ide a variable condenser of the Vernier type which ditl'ers from the ordinary type of vernier in that the tine adjustment is mudo with all of the plates and the provision of a separate and independently adjustable plate is rendered unnecessary.

il. further object of the invention resides in the provision of a variable condenser Aso designed that its capacity may be accurately hanged without sacrificing in any Way the t'nll advantage of. the vernier adjustment.

rthe above and other objects are attained by the .construrtiom Combination and arrangement of pnrts illustrated which lwhile .showing the preferred form ot' my invention not to be deemed as limiting and I reserve the right to change the mountings, plates and other details tomeet varying,r requirements without: departing vfrom my invention.

Figui-e l, is a longitudinal sectional view ythrough this condenser showing the .same mounted upon a nanel.

Figure Q, isa -front end view of' the eondenser.- showing,r the dials and panel removed.

Figure S, is a rear end View nf the eondenser.

Figure 4, is a diagrammatic View showing the overlajiping areas of the condenser plates, and

Figure 5, is a View similar to Figure illustrating' the adjustability of the plates.

Referring` to the drawings in detail the numeral l() designates the panel of an ordinarjY radio receiver or sending station upon which my improved condenser designated generically by the numeral 1l is mounted by means of srrews l2.

The condenser .ll eomprises a base plate 13 ot insulating material sueh as bakelite or hard rubber and secured tothe forward end ot said hase plate is a bracket 14 preferably ot' a metal stampino. This bracket; is provided at. its upper end with au openingI `formed with a rearwardly projecting' collar l5 whirh 'forms n bearingr 'for tbe adjusting shaft. lladiatingf arms '1G are formed on the brarket t4 and are pierced with threaded openings lor the reception ot the srrews l2.

1924. Serial No.. ?l.`i,58f.

Threaded into the horizontal arms 17 formed en the brat-liet intermedi/ete its up per and lower ends are. guide relis 18, the

ends of wliieh downturned as itl and secured to the bese plete 13 adjacent its rear end.

Slidably mounted on the guide rails 18 is a rear end plate 2O to which fixed een`- trally an internally screw threaded sleeve 21 which projects orwerdly therefrom to re eeire the threaded shaft; which. nrojeets rearwardly from the tornei-:et: le es* clearly shown in Figure rlihis threaded sheitt is mounted for rota-- tion in the sleeve 23 which, in turn is ro tatably mounted the sellar l5, and both the sleeve and shaft'. 22 are projected forwardly throueh the panel l0 te reeeire the knob ne and dial respectively.

Fitted on the reer end of the sleeve S63 is a collar 26 carrying a substantially fan-shaped plate 27 which provided on its rear face with a series of concentric seini-eirenler grooves for the reception of the rotor plates 28 .which are adapted to be received between the stator plates 29 which are in turn mounted in concentric grooves 'formed in the front f face oi a substzrntially tan shaped plate 30 carried on the rear' end plete 2t). This plete is eut out as at El to avoid eontnet with the sleeve 2l and depending from said plate a emitaet arm te which a, binding post 32 is mmnected.

Secured to the plete til are the stationary` binding;` posts 253 and 34.-, which are respeetively ronnected by conductors 35 rind 36 to the binding post 32 und the end El? et the sleeve 2l.

ln operatiem the rough adjustment between the plates is secured by rotating the dial Q5 which in turn rotates the rotor plates, relative to the stator plates Finer edjustmenta are then seeured rotation of the knob 24- whieh through the medium ot the threaded shaft end the sleeve causes the rear end plate 2t) to move inwardly or out wardly accordingr to the direction of rotation. A(')ln'ionsl the latter adjustment. can be more readily controlled and extremely tine adjustments tney be made. l

lVhile in the toregoing there has been shown and deseribed the preferred embodiment. ot* this invention. it, is to be understood thaty minor changes in the. details ot 'Construction, r'onibination and arrangement ot l: mm end of iihe seev'al. momie pluies extending); rear; shaped plate :md

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